MythTV 0.21 was recently released. I've been compiling and running from the 0.21-fixes CVS branch, but still have audio issues in MythVideo with some videos that have AC3 audio. It's been found that the NuppelVideoPlayer expects the audio not to be more than 2 seconds out of sync with the video.
It hasn't made it's way into the -fixes branch as a patch, but someone on the mythtv-dev list was kind enough to help me out with this patch, so I'm keeping it here for my own records. Maybe it'll help out some other MythTV users:
mythtv_increaseAudioTolerance.patch
There is an open ticket in the MythTV Trac system #4764, but the posted patch doesn't exactly patch well against the current -fixes release, nor does it compile after manual changes.

